The Parts Kit,check Valve, cataloged under National Stock Number 4820-01-633-1683, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Watts Regulator Company. Government technical data includes 2 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-633-1683 |
| Primary Part Number | 0887042 |
| Item Name | Parts Kit,check Valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Watts Regulator Company |
| Status | ACTIVE |
| Component Quantity | 5 |
| Supply Items and Quantities | COVER O-RING; 2 DISC ASSEMBLIES; 2 SEAT O-RINGS |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 0887042 PRIMARY | Watts Regulator Company (USA) |
| RK 007M1 RT PRIMARY | Watts Regulator Company (USA) |
| Reference | Meaning |
|---|---|
| PL-RP-BPD 1330 PG4 | 5/9 Secondary reference Watts Regulator Company |
NSN 4820-01-633-1683 is a Parts Kit,check Valve, manufactured by Watts Regulator Company, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-633-1683 has 2 manufacturer part numbers on file: 0887042 (Watts Regulator Company), RK 007M1 RT (Watts Regulator Company).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-633-1689. Verify interchangeability with system specifications before substitution.
Key specifications for 0887042: Component Quantity: 5; Supply Items and Quantities: COVER O-RING; 2 DISC ASSEMBLIES; 2 SEAT O-RINGS; Special Features: LEAD FREE; USE ON VALVE SIZE 3/4 IN TO 1.0 INCH IN; Part Name Assigned by Controlling Agency: PARTS KIT, COMPLETE RUBBER PARTS. 2 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.